Car wouldn't start

How did you test the 12 volt battery? Did you load test it if not try load testing the 12 volt battery.

Of course if you’ve already told it to the dealer this is a little bit late. It’s going to be a bummer if you towed it to the dealer and that’s all it was. I’ve heard it can be quite expensive for the diagnostics and installation of the battery.

My vote would definitely be the 12 V battery if you have not replaced it. It is five years old at this point.

 

Yeah, the bad 12v battery theory is a strong explainer. But since you already have the car at a dealer, we will have to wait for their assessment.

Please keep us updated. It would be the first PP total malfunction I have read about if it is not the 12v battery issue.

 

Please keep us posted. Good luck

 

If you did that, and that did not start the car, then yes, I agree, it could be something more serious, like an ECU malfunction. Would have been nice if you had pulled the code before towing it away, so we can think about more possibilities.

Good luck. As I said, please report back to us what you find out from the dealer.

 

ask them for the codes

 

Thanks for the update. I have not looked up what the codes mean... but it does look serious. BTW, How many miles on her? Since it s a 2017 model year, it is out of the basic warranty. Do you have an extended warranty on it? If it turns out to be a major breakdown of the system without any precipitating event, it is the first such report I am aware of.

Please keep us in the loop. I am curious to find out what caused it and how it was fixed ... and how expensive the repair is.

EDIT: I just realized that your dealer reported that the car is running fine without any major repair. Is that mean, they did not find anything wrong with the car even with all the codes?

 

OK, I looked them up. Here are what the OBD code means:

U011087, Lost Communication with Drive Motor Control Module (DMCM)
U019387, Lost Communication With Digital Audio Control Module A
U129387, Lost Communication between Hybrid Powertrain Control Module and Active Grille Air Shutter Missing Message
U0110, Lost Communication with Drive Motor Control Module (DMCM)
U0293, Lost Communication With Hybrid Powertrain Control Module
U0110, dup
U0100, Lost Communication with ECM/PCM 'A.
U0101, Lost Communication with TCM.
C1A50, Brake System Malfunction
B2786, No Response from Steering Lock ECU
U0103, Lost Communication with Gear Shift Control (GSC) Module
U115087 Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message

Read more at: https://www.obd-codes.com/

It sounds like there are major communication errors between ECUs. Maybe some of the wire was damaged by rodents? If the car is normal now without any repair, maybe some loose harness or damaged wire is making intermittent connection error? Just my guess.

 

Yep; probably a loose connection @ battery terminals. Did you place the meter leads on the battery post or on the battery connectors?
If the dealer hasn't already pulled the battery connectors off, clean, reinstall, re-tighten connectors - then spray with that battery connector sealant.
Experience tells me, that's probably what happened. I usually either rebend or replace battery clamp connectors; so I don't run into this issue.

Good Luck....

 

I agree. If it is a loose connector at the 12v battery terminal, I would think it does not start the other components. When you were driving 250miles a night before this happened, was it raining? Could it be caused by water getting in some of the harnesses that caused temporary short out which is not dry and runs fine?

 

Oh, well. I guess, it is one of those computer "glitches" that happens inexplicably. I get those often on my computer all the time. Often, rebooting is all I need to fix the problem.

 

Those look like the same series of message when my 2020 got hit by an EMP and we had to replace the ECU and BMC. It was at the dealer for a month getting everything fixed.